WO2020162415A1

WO2020162415A1 - Refrigerant-containing composition, and refrigerating method, refrigerating device operating method, and refrigerating device using said composition

Info

Publication number: WO2020162415A1
Application number: PCT/JP2020/003990
Authority: WO
Inventors: 瞬大久保; 佑樹四元; 板野　充司
Original assignee: ダイキン工業株式会社
Priority date: 2019-02-06
Filing date: 2020-02-03
Publication date: 2020-08-13
Also published as: US11827833B2; EP3922923A4; JP2020128528A; EP3922923A1; JP6791414B2; US20210355361A1; CN113412398A

Abstract

The present invention provides a composition containing a refrigerant that has the characteristics of having a sufficiently small GWP and having a refrigeration capacity and a coefficient of performance (COP) equivalent to or better than those of R134a. Specifically, the present invention provides a composition containing a refrigerant that contains cis-1,2-difluoroethylene (HFO-1132(Z)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein the contained proportions of HFO-1132(Z) and HFO-1234yf are respectively 53.0-59.5 mass% and 47.0-40.5 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf.

Description

Refrigerant-containing composition, refrigeration method using the composition, refrigeration apparatus operation method, and refrigeration apparatus

The present disclosure relates to a composition containing a refrigerant, and a refrigerating method, a refrigerating apparatus operating method and a refrigerating apparatus using the composition.

While global warming is being discussed around the world as a serious problem, the development of air-conditioners and refrigeration systems that have less impact on the environment is becoming increasingly important.

Currently, 1,1,1,2-tetrafluoroethane (HFC-134a or R134a), which is used as a refrigerant for air conditioners in home air conditioners, can be replaced with a low global warming potential (GWP). Various mixed refrigerants have been proposed (for example, Patent Document 1).

International Publication No. 2005/105947

This disclosure has a coefficient of performance [Coefficient of Performance (COP)] equal to or higher than that of R134a and refrigeration capacity [Refrigeration Capacity (sometimes referred to as Cooling Capacity, Capacity)], and sufficient GWP. It is an object to provide a composition containing a refrigerant having the property of being small. Another object of the present disclosure is to provide a refrigerating method, a refrigerating apparatus operating method, and a refrigerating apparatus using the composition.

The present disclosure provides the inventions of the aspects described below.
Item 1.
A composition containing a refrigerant,
The refrigerant contains cis-1,2-difluoroethylene (HFO-1132(Z)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132(Z) and HFO-1234yf,
The content ratio of HFO-1132(Z) is 53.0-59.5 mass%,
A composition in which the content of HFO-1234yf is 47.0 to 40.5% by mass.
Item 2.
Item 2. The composition according to Item 1, wherein the refrigerant is used for operating a refrigeration cycle having an evaporation temperature of -60 to 20°C.
Item 3.
Item 3. The composition according to Item 1 or 2, wherein the refrigerant comprises HFO-1132(Z) and HFO-1234yf only.
Item 4.
A composition containing a refrigerant,
The refrigerant contains cis-1,2-difluoroethylene (HFO-1132(Z)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132(Z) and HFO-1234yf,
The content ratio of HFO-1132(Z) is 41.0 to 49.2 mass%,
A composition in which the content ratio of HFO-1234yf is 59.0 to 50.8 mass %.
Item 5.
Item 5. The composition according to Item 4, wherein the refrigerant is used for operating a refrigeration cycle having an evaporation temperature of -60 to 20°C.
Item 6.
Item 6. The composition according to Item 4 or 5, wherein the refrigerant comprises HFO-1132(Z) and HFO-1234yf only.
Item 7.
R134a, R22, R12, R404A, R407A, R407C, R407F, R407H, R410A, R413A, R417A, R422A, R422B, R422C, R422D, R423A, R424A, R426A, R427A, R428A, R430A, R434A, R437A, R438A, R448A, R448A, R438A, R438A, R438A, R438A, R438A Item 1 to 6, which is used as a substitute refrigerant for R449A, R449B, R449C, R450A, R452A, R452B, R454A, R452B, R454C, R455A, R465A, R502, R507, R513A, R513B, R515A or R515B. The composition as described.
Item 8.
Item 8. The composition according to any one of Items 1 to 7, which contains at least one substance selected from the group consisting of water, a tracer, an ultraviolet fluorescent dye, a stabilizer, and a polymerization inhibitor.
Item 9.
9. The composition according to any one of items 1 to 8, which further contains refrigerating machine oil and is used as a working fluid for a refrigerating apparatus.
Item 10.
Item 10. The composition according to Item 9, wherein the refrigerating machine oil contains at least one polymer selected from the group consisting of polyalkylene glycol (PAG), polyol ester (POE), and polyvinyl ether (PVE).
Item 11.
Item 11. A refrigeration method including a step of operating a refrigeration cycle using the composition according to any one of Items 1 to 10.
Item 12.
A refrigeration method comprising a step of operating a refrigeration cycle using a composition containing a refrigerant, wherein the refrigerant is trans-1,2-difluoroethylene (HFO-1132(E)) and 2,3,3, Contains 3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132(Z) and HFO-1234yf,
The content ratio of HFO-1132(Z) is 53.0-59.5 mass%,
A freezing method in which the content ratio of HFO-1234yf is 47.0 to 40.5 mass %.
Item 13.
Item 13. The refrigeration method according to Item 12, wherein the evaporation temperature in the refrigeration cycle is -60 to 20°C.
Item 14.
Item 14. The composition according to Item 12 or 13, wherein the refrigerant comprises HFO-1132(Z) and HFO-1234yf only.
Item 15.
A refrigeration method comprising a step of operating a refrigeration cycle using a composition containing a refrigerant, wherein the refrigerant is trans-1,2-difluoroethylene (HFO-1132(E)) and 2,3,3, Contains 3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132(Z) and HFO-1234yf,
The content ratio of HFO-1132(Z) is 41.0 to 49.2 mass%,
A freezing method in which the content of HFO-1234yf is 59.0 to 50.8 mass %.
Item 16.
Item 16. The refrigeration method according to Item 15, wherein the evaporation temperature in the refrigeration cycle is -60 to 20°C.
Item 17.
Item 17. The composition according to Item 15 or 16, wherein the refrigerant comprises HFO-1132(Z) and HFO-1234yf only.
Item 18.
Item 11. A method of operating a refrigeration system, which comprises operating a refrigeration cycle using the composition according to any one of items 1 to 10.
Item 19.
Item 11. A refrigeration system containing the composition according to any one of items 1 to 10 as a working fluid.
Item 20.
Item 19, which is an air conditioner, a refrigerator, a freezer, a chiller, an ice maker, a refrigerating showcase, a freezing showcase, a refrigerating/refrigerating unit, a refrigerator/freezer for a refrigerator/freezer, a vehicle air conditioner, a turbo refrigerator or a screw refrigerator. The refrigeration system described.
Item 21.
Item 11. The composition according to any one of items 1 to 10, which is used as a refrigerant.
Item 22.
Item 22. The composition according to Item 21, which is used as a refrigerant in a refrigerator.
Item 23.
The refrigerating device is an air conditioner, a refrigerator, a freezer, a chiller, an ice maker, a refrigerating showcase, a refrigerating showcase, a refrigerating/refrigerating unit, a refrigerator/refrigerator for a refrigerator/freezer, an in-vehicle air conditioner, a turbo refrigerator or a screw refrigerator. Item 23. The composition according to Item 22.
Item 24.
Use of the composition according to any one of items 1 to 10 as a refrigerant.
Item 25.
Item 25. The use according to Item 24 in a refrigerator.
Item 26.
The refrigerating device is an air conditioner, a refrigerator, a freezer, a chiller, an ice maker, a refrigerating showcase, a refrigerating showcase, a refrigerating/refrigerating unit, a refrigerator/refrigerator for a refrigerator/freezer, an in-vehicle air conditioner, a turbo refrigerator or a screw refrigerator. The use according to Item 25.

The composition containing the refrigerant of the present disclosure has characteristics that it has a coefficient of performance (COP) and refrigerating capacity (Capacity) equal to or higher than R134a, and that GWP is sufficiently small.

It is a schematic diagram of an experimental device for discriminating flammability (combustible or incombustible).

As a result of intensive studies to solve the above problems, the present inventors have found that cis-1,2-difluoroethylene (HFO-1132(Z)) and 2,3,3,3-tetrafluoropropene (HFO). It has been found that a composition containing a mixed refrigerant containing -1234yf) has the above characteristics.

The present disclosure has been completed as a result of further research based on such findings. The present invention includes the following embodiments.

<Definition of terms>
In the present specification, the numerical range indicated by using "to" indicates the range including the numerical values before and after "to" as the minimum value and the maximum value, respectively.

In the present specification, the terms “contain” and “include” include the concepts of “consisting essentially of” and “consisting only of”.

In the present specification, the term "refrigerant" includes at least a compound having a refrigerant number (ASHRAE number) starting with R representing the type of refrigerant, which is defined by ISO817 (International Organization for Standardization), and further has a refrigerant number. Even if not added yet, those having the characteristics as a refrigerant equivalent to them are included.

・Refrigerants are roughly classified into "fluorocarbon-based compounds" and "non-fluorocarbon-based compounds" in terms of compound structure. “Fluorocarbon compounds” include chlorofluorocarbon (CFC), hydrochlorofluorocarbon (HCFC) and hydrofluorocarbon (HFC). Examples of the “non-fluorocarbon compound” include propane (R290), propylene (R1270), butane (R600), isobutane (R600a), carbon dioxide (R744) and ammonia (R717).

As used herein, the term “composition containing a refrigerant” includes
(1) Refrigerant itself (including a mixture of refrigerants, that is, "mixed refrigerant"),
(2) a composition which further comprises other components and which can be used to obtain a working fluid for a refrigerating machine by mixing with at least refrigerating machine oil,
(3) At least a refrigerating machine working fluid containing refrigerating machine oil is included.

In the present specification, of these three aspects, the composition of (2) is referred to as a "refrigerant composition" in distinction from the refrigerant itself (including a mixed refrigerant). Further, the working fluid for a refrigerating machine of (3) is referred to as a "refrigerator oil-containing working fluid" in distinction from a "refrigerant composition".

As used herein, the term "alternative", when used in the context of "alternating" a first refrigerant with a second refrigerant, as a first type, to operate using a first refrigerant. In the designed equipment, the second refrigerant is used by only changing a few parts (at least one of refrigerating machine oil, gasket, packing, expansion valve, dryer and other parts) and adjusting the equipment as necessary. It means that it can be operated under optimum conditions. In other words, this type refers to operating the same device by "substituting" for the refrigerant. As an aspect of "alternative" of this type, "drop-in replacement" and "nearly drop-in (increase in the order of the degree of change or adjustment required when the second refrigerant is replaced) There can be "nealy drop in" alternatives and "retrofit".

As a second type, a device designed to operate using a second refrigerant, for the same purpose as the existing use of the first refrigerant, it is also possible to use the second refrigerant mounted, Included in the term "alternative". This type refers to providing the same application "alternative" to the refrigerant.

In the present specification, the term “refrigerating device” broadly refers to an entire device that removes heat from an object or space to bring it to a temperature lower than the ambient air and to maintain this low temperature. In other words, in a broad sense, the refrigerating apparatus refers to a converting apparatus that obtains energy from the outside to perform work to convert energy in order to move heat from a lower temperature to a higher temperature. In the present disclosure, in a broad sense, a refrigeration system is synonymous with a heat pump.

Further, in the present disclosure, in a narrow sense, the refrigerating apparatus is used separately from the heat pump depending on the difference in the temperature range to be used and the operating temperature. In this case, a device that puts a low-temperature heat source in a temperature region lower than the atmospheric temperature is called a refrigerating device, while a device that uses the heat dissipation effect by driving the refrigeration cycle by placing the low-temperature heat source near the atmospheric temperature. Sometimes called a heat pump. There are some air conditioners having the “cooling mode”, the “heating mode”, and the like, which have the functions of a refrigerating device in the narrow sense and a heat pump in the narrow sense even though they are the same device. In the present specification, the terms “refrigerating device” and “heat pump” are used in a broad sense unless otherwise specified.

In the present specification, the term "temperature glide" means the absolute value of the difference between the start temperature and the end temperature of the phase change process of the composition containing the refrigerant of the present disclosure in the components of the heat cycle system. You can

In the present specification, the “vehicle air conditioner” is a kind of refrigeration system used in vehicles such as gasoline vehicles, hybrid vehicles, electric vehicles, and hydrogen vehicles. The on-vehicle air conditioner is an evaporator that causes a liquid refrigerant to exchange heat, the compressor sucks the evaporated refrigerant gas, and the adiabatic compressed refrigerant gas is cooled by a condenser and liquefied, and an expansion valve After refrigeration cycle, and after adiabatic expansion is performed, the refrigeration system is composed of a refrigeration cycle in which the refrigerant is supplied again to the evaporator as a liquid refrigerant.

In the present specification, the “turbo refrigerator” is a kind of large-scale refrigerator, and causes a liquid refrigerant to perform heat exchange in an evaporator, and the evaporated refrigerant gas is sucked by a centrifugal compressor to perform adiabatic compression. The refrigerating apparatus includes a refrigerating cycle in which the refrigerant gas thus cooled is liquefied by being cooled in a condenser, further passed through an expansion valve for adiabatic expansion, and then supplied again to the evaporator as a liquid refrigerant. The above-mentioned "large refrigerator" refers to a large air conditioner for the purpose of air conditioning in a building unit.

In the present specification, “saturation pressure” means the pressure of saturated steam.

In this specification, the evaporation temperature in the refrigeration cycle means the temperature at which the refrigerant liquid absorbs heat and becomes vapor in the evaporation step of the refrigeration cycle. The evaporation temperature in the refrigeration cycle can be determined by measuring the temperature at the evaporator inlet and/or the evaporator outlet. In the case of the simple substance refrigerant and the azeotropic refrigerant, the evaporation temperature is constant, but in the case of the non-azeotropic refrigerant, the evaporation temperature is the average value of the temperature at the evaporator inlet and the dew point temperature. That is, in the case of a non-azeotropic refrigerant, it can be calculated that “evaporation temperature=(evaporator inlet temperature+dew point temperature)/2”.

In the present specification, the “discharge temperature” means the temperature of the mixed refrigerant at the discharge port of the compressor.

In the present specification, “evaporation pressure” means the saturation pressure at the evaporation temperature.

In the present specification, “condensation pressure” means the saturation pressure at the condensation temperature.

The technical meanings of nonflammable and slightly flammable in this specification are as follows.

In the present specification, the refrigerant is ``non-flammable'', and the WCF (Worst case of formation for flammability) composition, which is the most flammable composition among the allowable refrigerant concentrations in the US ANSI/ASHRAE 34-2013 standard, is determined to be "class 1". Means to be done.

In this specification, the refrigerant being "lightly burned" means that the WCF composition is judged to be "Class 2L" in the US ANSI/ASHRAE 34-2013 standard.

In this specification, the refrigerant being "weakly flammable" means that the WCF composition is judged to be "class 2" in the US ANSI/ASHRAE 34-2013 standard.

In this specification, GWP means a value based on the value of IPCC (Intergovernmental Panel on Climate Change) Fourth Report.

1. Composition The composition of the present disclosure contains a refrigerant, and examples of the refrigerant include "refrigerant 1" and "refrigerant 2". The refrigerant 1 and the refrigerant 2 will be described below. In the present specification, the “refrigerant of the present disclosure” means the refrigerant 1 and the refrigerant 2.

1.1 Refrigerant 1
The refrigerant included in the compositions of the present disclosure, in one embodiment, contains HFO-1132(Z) and HFO-1234yf. This refrigerant may be referred to as "refrigerant 1".

Refrigerant 1 contains HFO-1132(Z) and HFO-1234yf in an amount of 53.0-59.5% by mass, and HFO-1234yf in an amount of 47.0-40.5% by mass based on the total mass of HFO-1132(Z). %.

Refrigerant 1 has such a configuration that (1) GWP is sufficiently small (100 or less), (2) has a COP equal to or higher than R134a, and (3) equal to or higher than R134a. It has various desirable characteristics as an alternative refrigerant of R134a, that is, it has a refrigerating capacity of (4) and that it is slightly flammable (class 2L) according to the ASHRAE standard.

In this item, GWP is sufficiently small means that GWP is usually 100 or less, preferably 75 or less, more preferably 50 or less, and further preferably 25 or less.

In Refrigerant 1, when the content ratio of HFO-1132(Z) to the total mass of HFO-1132(Z) and HFO-1234yf exceeds 59.5 mass %, there is a problem that refrigerant 1 becomes a weak flame.

Refrigerant 1 has a refrigerating capacity for R134a of usually 95% or more, preferably 98% or more, more preferably 99% or more, from the viewpoint of being able to reduce power consumption during operation with respect to a commercially available R134a refrigeration system. It is more preferably 100% or more, and particularly preferably 100.5% or more.

③ Refrigerant 1 has a GWP of 100 or less, so it can significantly reduce the environmental load compared to other general-purpose refrigerants from the viewpoint of global warming.

Refrigerant 1 has a ratio of coefficient of performance (COP) of the power consumed in the refrigeration cycle to R134a (coefficient of performance (COP)) of 100% or more, so it can be applied to commercial R134a refrigeration equipment without major design changes. it can.

From the perspective of energy consumption efficiency, it is preferable that Refrigerant 1 has a high ratio (power coefficient (COP)) of power consumed in the refrigeration cycle to R134a and refrigeration capacity. Specifically, the COP with respect to R134a is preferably 98% or more, more preferably 99% or more, further preferably 100% or more, and particularly preferably 101% or more.

Refrigerant 1 has a HFO-1132(Z) content of 53.0 to 59.0 mass% and a HFO-1234yf content of 47.0 to 41.0 mass, based on the total mass of HFO-1132(Z) and HFO-1234yf. % Is preferable.

Refrigerant 1 has a HFO-1132(Z) content ratio of 54.0 to 59.0 mass% and a HFO-1234yf content ratio of 46.0 to 41.0 mass, based on the total mass of HFO-1132(Z) and HFO-1234yf. % Is more preferable.

Refrigerant 1 has a HFO-1132(Z) content of 55.0 to 59.0 mass% and a HFO-1234yf content of 45.0 to 41.0 mass, based on the total mass of HFO-1132(Z) and HFO-1234yf. % Is more preferable.

Refrigerant 1 has a HFO-1132(Z) content of 56.0 to 59.0 mass% and a HFO-1234yf content of 44.0 to 41.0 mass, based on the total mass of HFO-1132(Z) and HFO-1234yf. % Is particularly preferable.

Refrigerant 1 may contain HFO-1132(Z) and HFO-1234yf in total of these concentrations, usually 99.5% by mass or more. In the present disclosure, the total amount of HFO-1132(Z) and HFO-1234yf in the entire refrigerant 1 is preferably 99.7% by mass or more, more preferably 99.8% by mass or more, and further preferably 99.9% by mass or more. ..

The refrigerant 1 may further contain other refrigerants in addition to the HFO-1132(Z) and HFO-1234yf within a range not impairing the above characteristics. In this case, the content ratio of the other refrigerant in the entire refrigerant 1 is preferably 0.5% by mass or less, more preferably 0.3% by mass or less, further preferably 0.2% by mass or less, and particularly preferably 0.1% by mass or less. The other refrigerant is not particularly limited and can be widely selected from known refrigerants widely used in this field. The refrigerant 1 may include another refrigerant alone, or may include two or more kinds of other refrigerants.

In the present disclosure, the refrigerant 1 is preferably used for operating a refrigeration cycle having an evaporation temperature of −60 to 20° C. from the viewpoint of sufficiently cooling the room and the object to be cooled.

In the refrigeration cycle in which the refrigerant 1 is used, the evaporation temperature is more preferably 15°C or lower, further preferably 10°C or lower, and further preferably 5°C or lower, from the viewpoint of sufficiently cooling the room and the object to be cooled. Is more preferable, and it is particularly preferable that the temperature is lower than 0°C.

In the refrigeration cycle in which the refrigerant 1 is used, the evaporation temperature is preferably −55° C. or higher, more preferably −50° C. or higher, further preferably −45° C. or higher, particularly preferably from the viewpoint of adjusting the evaporation pressure to 0.02 MPa or higher. -40℃ or higher.

In the refrigeration cycle in which the refrigerant 1 is used, the evaporation temperature is more preferably -55°C or higher and 15°C or lower, even more preferably -50°C or higher and 10°C or lower, further preferably -45°C or higher and 5°C or lower, particularly preferably -40℃ or more and less than 0℃.

It is particularly preferable that the refrigerant 1 consists only of HFO-1132(Z) and HFO-1234yf. In other words, it is particularly preferable that the total concentration of HFO-1132(Z) and HFO-1234yf in the refrigerant 1 is 100% by mass.

When Refrigerant 1 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 53.0-59.5 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is preferable that the content ratio of HFO-1234yf is 47.0 to 40.5% by mass.

When Refrigerant 1 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 54.0-59.0 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is even more preferable that the content ratio of HFO-1234yf is 46.0 to 41.0% by mass.

When Refrigerant 1 consists of HFO-1132(Z) and HFO-1234yf only, the HFO-1132(Z) content is 55.0-59.0% by mass based on the total mass of HFO-1132(Z) and HFO-1234yf. It is more preferable that the content ratio of HFO-1234yf is 45.0 to 41.0% by mass.

When Refrigerant 1 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 56.0-59.0 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is particularly preferable that the content ratio of HFO-1234yf is 44.0 to 41.0% by mass.

When Refrigerant 1 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 53.0-59.5 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is preferable that the content ratio of HFO-1234yf is 47.0 to 40.5 mass% and the refrigerant 1 is used for operating the refrigeration cycle having the evaporation temperature of −55° C. to 15° C.

When Refrigerant 1 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 54.0-59.0 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf. More preferably, the content ratio of HFO-1234yf is 46.0 to 41.0% by mass, and the refrigerant 1 is used for operating the refrigeration cycle in which the evaporation temperature is −50° C. to 10° C.

When Refrigerant 1 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 55.0-59.0 mass with respect to the total mass of HFO-1132(Z) and HFO-1234yf. %, the content of HFO-1234yf is 45.0 to 41.0% by mass, and Refrigerant 1 is more preferably used for operating a refrigeration cycle having an evaporation temperature of −45° C. to 5° C.

When the refrigerant 1 consists of HFO-1132(Z) and HFO-1234yf only, the HFO-1132(Z) content is 56.0-59.0 mass with respect to the total mass of HFO-1132(Z) and HFO-1234yf. %, the content ratio of HFO-1234yf is 44.0 to 41.0% by mass, and the refrigerant 1 is particularly preferably used for operating a refrigeration cycle having an evaporation temperature of -40°C or higher and lower than 0°C.

1.2 Refrigerant 2
The refrigerant included in the composition of the present disclosure, in one embodiment, contains HFO-1132(Z) and HFO-1234yf, and HFO-1132(Z) and HFO-1234yf, based on the total mass of HFO-1132yf. The content ratio of (Z) is 41.0 to 49.2% by mass, and the content ratio of HFO-1234yf is 59.0 to 50.8% by mass. This refrigerant may be referred to as "refrigerant 2".

Refrigerant 2 has such a configuration that (1) GWP is sufficiently small (100 or less), (2) has a COP equal to or higher than R134a, and (3) equal to or higher than R134a. It has various desirable characteristics as an alternative refrigerant of R134a, that is, it has a refrigerating capacity of (4) and that it is slightly flammable (class 2L) according to the ASHRAE standard.

▽ Refrigerant 2 has a GWP of 100 or less, which can significantly reduce the environmental load compared to other general-purpose refrigerants from the viewpoint of global warming.

Refrigerant 2 has a refrigerating capacity for R134a of usually 95% or more, preferably 98% or more, more preferably 99% or more, from the viewpoint that the power consumption during operation can be reduced with respect to a commercially available R134a refrigeration system. It is more preferably 100% or more, and particularly preferably 101% or more.

Refrigerant 2 has a ratio of the power consumed in the refrigeration cycle to R134a and the refrigerating capacity (coefficient of performance (COP)) of 100% or more, so it can be applied to commercial R134a refrigeration equipment without major design changes. it can.

From the viewpoint of energy consumption efficiency, it is preferable that Refrigerant 2 has a high ratio of power consumed in the refrigeration cycle to R134a and refrigeration capacity (coefficient of performance (COP)). Specifically, the COP with respect to R134a is preferably 98% or more, more preferably 99% or more, further preferably 100% or more, and particularly preferably 101% or more.

Refrigerant 2 has a HFO-1132(Z) content ratio of 42.0 to 49.2 mass% and a HFO-1234yf content ratio of 58.0 to 50.8 mass with respect to the total mass of HFO-1132(Z) and HFO-1234yf. % Is preferable.

Refrigerant 2 has a HFO-1132(Z) content ratio of 43.0 to 49.2 mass% and a HFO-1234yf content ratio of 57.0 to 50.8 mass, based on the total mass of HFO-1132(Z) and HFO-1234yf. % Is more preferable.

Refrigerant 2 has a HFO-1132(Z) content ratio of 44.0 to 49.0 mass% and a HFO-1234yf content ratio of 56.0 to 51.0 mass, based on the total mass of HFO-1132(Z) and HFO-1234yf. % Is more preferable.

Refrigerant 2 may contain HFO-1132(Z) and HFO-1234yf in total of these concentrations, usually 99.5% by mass or more. In the present disclosure, the total amount of HFO-1132(Z) and HFO-1234yf in the entire refrigerant 2 is preferably 99.7% by mass or more, more preferably 99.8% by mass or more, and further preferably 99.9% by mass or more. ..

Refrigerant 2 can further contain other refrigerants in addition to HFO-1132(Z) and HFO-1234yf within a range that does not impair the above characteristics. In this case, the content ratio of the other refrigerant in the entire refrigerant 2 is preferably 0.5% by mass or less, more preferably 0.3% by mass or less, further preferably 0.2% by mass or less, and particularly preferably 0.1% by mass or less. The other refrigerant is not particularly limited and can be widely selected from known refrigerants widely used in this field. The refrigerant 2 may include another refrigerant alone, or may include two or more kinds of other refrigerants.

In the present disclosure, the refrigerant 2 is preferably used for operating a refrigeration cycle having an evaporation temperature of −60 to 20° C. from the viewpoint of sufficiently cooling the room and the object to be cooled.

In the refrigeration cycle in which the refrigerant 2 is used, the evaporation temperature is more preferably 15°C or lower, further preferably 10°C or lower, and more preferably 5°C or lower, from the viewpoint of sufficiently cooling the room and the object to be cooled. Is more preferable, and it is particularly preferable that the temperature is lower than 0°C.

In the refrigeration cycle in which the refrigerant 2 is used, the evaporation temperature is preferably −55° C. or higher, more preferably −50° C. or higher, even more preferably −45° C. or higher, particularly preferably from the viewpoint of adjusting the evaporation pressure to 0.02 MPa or higher. -40℃ or higher.

In the refrigeration cycle in which the refrigerant 2 is used, the evaporation temperature is more preferably -55°C or higher and 15°C or lower, still more preferably -50°C or higher and 10°C or lower, further preferably -45°C or higher and 5°C or lower, and particularly preferably -40℃ or more and less than 0℃.

It is particularly preferable that the refrigerant 2 consists only of HFO-1132(Z) and HFO-1234yf. In other words, it is particularly preferable that the total concentration of HFO-1132(Z) and HFO-1234yf in the refrigerant 2 is 100% by mass.

When the refrigerant 2 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 41.0 to 49.2% by mass with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is preferable that the content ratio of HFO-1234yf is 59.0 to 50.8 mass %.

When the refrigerant 2 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 42.0 to 49.2 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is more preferable that the content ratio of HFO-1234yf is 58.0 to 50.8 mass %.

When the refrigerant 2 consists only of HFO-1132(Z) and HFO-1234yf, the content ratio of HFO-1132(Z) is 43.0 to 49.2 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is more preferable that the content ratio of HFO-1234yf is 57.0 to 50.8% by mass.

When the refrigerant 2 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 44.0 to 49.0 mass% with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is particularly preferable that the content ratio of HFO-1234yf is 56.0 to 51.0 mass %.

When the refrigerant 2 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 41.0 to 49.2% by mass with respect to the total mass of HFO-1132(Z) and HFO-1234yf. It is preferable that the content ratio of HFO-1234yf is 59.0 to 50.8 mass% and the refrigerant 2 is used for operating the refrigeration cycle having the evaporation temperature of −55° C. to 15° C.

When the refrigerant 2 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 42.0-49.2 mass with respect to the total mass of HFO-1132(Z) and HFO-1234yf. %, the content ratio of HFO-1234yf is 58.0 to 50.8 mass %, and the refrigerant 2 is more preferably used for operating the refrigeration cycle having the evaporation temperature of −50° C. to 10° C.

When the refrigerant 2 consists of HFO-1132(Z) and HFO-1234yf only, the content ratio of HFO-1132(Z) is 43.0-49.2 mass with respect to the total mass of HFO-1132(Z) and HFO-1234yf. %, the content ratio of HFO-1234yf is 57.0 to 50.8 mass %, and the refrigerant 2 is more preferably used for operating the refrigeration cycle having the evaporation temperature of −45° C. to 5° C.

When the refrigerant 2 consists only of HFO-1132(Z) and HFO-1234yf, the content ratio of HFO-1132(Z) is 44.0-49.0 mass with respect to the total mass of HFO-1132(Z) and HFO-1234yf. %, the content ratio of HFO-1234yf is 56.0 to 51.0 mass %, and the refrigerant 2 is particularly preferably used for operating a refrigeration cycle having an evaporation temperature of -40°C or higher and lower than 0°C.

1.3 Uses The composition containing the refrigerant of the present disclosure is used as a working fluid of 1) a refrigeration method including a step of operating a refrigeration cycle, 2) an existing refrigerant in a method of operating a refrigeration apparatus that operates the refrigeration cycle, It can be widely used for various purposes.

Here, the refrigeration cycle, the refrigerant through the compressor (refrigerant 1 and refrigerant 2 of the present disclosure) only in the state of the refrigerant, or in the state of the refrigerant composition or refrigerating machine oil-containing working fluid described later It means circulating energy inside and converting energy.

The present disclosure includes the use of the refrigerant of the present disclosure (or a composition containing the same) in a refrigeration method, the use of the refrigerant of the present disclosure (or a composition containing the same) in an operation method of a refrigeration apparatus, and the like. Refrigerating devices having a refrigerant (or a composition containing them) are also included.

The composition containing Refrigerant 1 of the present disclosure is preferably used for operating a refrigeration cycle having an evaporation temperature of -60 to 20°C from the viewpoint of sufficiently cooling the room and the object to be cooled. Further, by using the composition containing Refrigerant 1 of the present disclosure to operate a refrigeration cycle having an evaporation temperature of -60 to 20°C, the COP during operation becomes higher than that of a commercially available refrigerating apparatus for R134a. Therefore, power consumption can be reduced.

In the refrigeration cycle in which the composition containing Refrigerant 1 is used, the evaporation temperature is more preferably 15° C. or lower, further preferably 10° C. or lower, from the viewpoint of sufficiently cooling the room or the object to be cooled. It is more preferably 5° C. or lower, still more preferably 0° C. or lower.

In the refrigeration cycle in which the composition containing Refrigerant 1 is used, the evaporation temperature is preferably −55° C. or higher, more preferably −50° C. or higher, further preferably −45° C., from the viewpoint of adjusting the evaporation pressure to 0.02 MPa or higher. Or higher, particularly preferably -40°C or higher.

In a refrigeration cycle in which a composition containing Refrigerant 1 is used, the evaporation temperature is more preferably −55° C. or higher and 15° C. or lower, even more preferably −50° C. or higher and 10° C. or lower, and further preferably −45° C. or higher and 5° C. The temperature is particularly preferably -40°C or higher and lower than 0°C.

The composition containing Refrigerant 1 is preferably used for operating a refrigeration cycle having a condensation temperature of 0 to 70°C.

In the refrigeration cycle in which the composition containing Refrigerant 1 is used, the condensation temperature is preferably 70° C. or lower, more preferably 60° C. or lower, and 55° C. or lower from the viewpoint of extending the life of the refrigerating apparatus. It is more preferable that the temperature is 50° C. or lower, and particularly preferably 50° C. or lower.

In the refrigeration cycle in which the composition containing Refrigerant 1 is used, the condensation temperature is preferably 0°C or higher, more preferably 5°C or higher, and 10°C or higher from the viewpoint of preventing dew condensation on the outdoor unit. Is more preferable, and 15° C. or higher is particularly preferable.

In the present disclosure, a device that constitutes a refrigeration cycle in which a composition containing the refrigerant 1 is circulated via a compressor can be provided.

The composition containing Refrigerant 2 is preferably used for operating a refrigeration cycle having an evaporation temperature of -60 to 20°C from the viewpoint of sufficiently cooling the room and the object to be cooled.

In the refrigeration cycle in which the composition containing the refrigerant 2 is used, the evaporation temperature is more preferably 15°C or lower, and further preferably 10°C or lower, from the viewpoint of sufficiently cooling the room and the object to be cooled. It is more preferably 5° C. or lower, still more preferably 0° C. or lower.

In the refrigeration cycle in which the composition containing Refrigerant 2 is used, the evaporation temperature is preferably −55° C. or higher, more preferably −50° C. or higher, still more preferably −45° C., from the viewpoint of adjusting the evaporation pressure to 0.02 MPa or higher. Or higher, particularly preferably -40°C or higher.

In a refrigeration cycle in which a composition containing Refrigerant 2 is used, the evaporation temperature is more preferably −55° C. or higher and 15° C. or lower, even more preferably −50° C. or higher and 10° C. or lower, and further preferably −45° C. or higher and 5° C. The temperature is particularly preferably -40°C or higher and lower than 0°C.

The composition containing Refrigerant 2 is preferably used for operating a refrigeration cycle having a condensation temperature of 0 to 70°C.

In the refrigeration cycle in which the composition containing Refrigerant 2 is used, the condensation temperature is preferably 70° C. or lower, more preferably 60° C. or lower, and 55° C. or lower from the viewpoint of extending the life of the refrigerating apparatus. It is more preferable that the temperature is 50° C. or lower, and particularly preferably 50° C. or lower.

In the refrigeration cycle in which the composition containing Refrigerant 2 is used, the condensation temperature is preferably 0°C or higher, more preferably 5°C or higher, and 10°C or higher from the viewpoint of preventing dew condensation on the outdoor unit. Is more preferable, and 15° C. or higher is particularly preferable.

In the present disclosure, a device that constitutes a refrigeration cycle in which a composition containing the refrigerant 2 is circulated via a compressor can be provided.

Examples of the refrigerating device to which the refrigerant 1 and the refrigerant 2 (or the composition containing them) of the present disclosure can be applied include, for example, air conditioners, refrigerators, freezers, chillers, ice makers, refrigerating showcases, freezing showcases, and refrigerating/refrigerating units. At least one selected from the group consisting of a refrigerator for a refrigerating warehouse, a vehicle air conditioner, a turbo refrigerator, and a screw refrigerator is preferred.

The compositions of the present disclosure include R134a, R22, R12, R404A, R407A, R407C, R407F, R407H, R410A, R413A, R417A, R422A, R422B, R422C, R422D, R423A, R424A, R426A, R427A, R428A, R430A, R434A. , R437A, R438A, R448A, R449A, R449B, R450A, R454A, R454C, R455A, R465A, R502, R507, R513A, R513B, R515A or R515B. Among them, the composition of the present disclosure has characteristics of having a coefficient of performance (COP) and refrigerating capacity (Capacity) equal to or higher than that of R134a, and having a sufficiently small GWP, and therefore, it is an alternative to R134a. It is particularly suitable for use as a refrigerant.

2. Refrigerant Composition The refrigerant composition of the present disclosure includes at least the refrigerant of the present disclosure and can be used for the same purpose as the refrigerant of the present disclosure.

Further, the refrigerant composition of the present disclosure can be used to obtain a working fluid for a refrigerating apparatus by further mixing it with at least refrigerating machine oil.

The refrigerant composition of the present disclosure further contains at least one other component in addition to the refrigerant of the present disclosure. The refrigerant composition of the present disclosure may contain at least one of the following other components, if necessary.

As described above, when the refrigerant composition of the present disclosure is used as a working fluid in a refrigerating apparatus, it is usually used as a mixture with at least refrigerating machine oil.

Here, the refrigerant composition of the present disclosure is preferably substantially free of refrigerating machine oil. Specifically, the refrigerant composition of the present disclosure has a refrigerating machine oil content of preferably 0 to 1% by mass, more preferably 0 to 0.5% by mass, and further preferably 0 to It is 0.25% by mass, and particularly preferably 0 to 0.1% by mass.

2.1 refrigerant composition of the water present disclosure may include trace amounts of water.

The water content of the refrigerant composition is preferably 0 to 0.1% by mass, more preferably 0 to 0.075% by mass, further preferably 0 to 0.05% by mass, based on the entire refrigerant. It is particularly preferably from 0.025% by mass.

Since the refrigerant composition contains a trace amount of water, the intramolecular double bond of the unsaturated fluorocarbon compound that may be contained in the refrigerant is stabilized, and the oxidation of the unsaturated fluorocarbon compound is less likely to occur. The stability of the refrigerant composition is improved.

2.2 Tracer A tracer is added to the refrigerant composition of the present disclosure at a detectable concentration so that if the refrigerant composition of the present disclosure is diluted, contaminated, or otherwise changed, the change can be traced.

The refrigerant composition of the present disclosure may contain one type of the above tracers, or may contain two or more types.

The above-mentioned tracer is not particularly limited, and can be appropriately selected from the commonly used tracers. Preferably, a compound that cannot become an impurity that is inevitably mixed in the refrigerant of the present disclosure is selected as a tracer.

Examples of the tracer include hydrofluorocarbon, hydrochlorofluorocarbon, chlorofluorocarbon, hydrochlorocarbon, fluorocarbon, deuterated hydrocarbon, deuterated hydrofluorocarbon, perfluorocarbon, fluoroether, brominated compound, iodinated compound, alcohol. , Aldehydes, ketones, nitrous oxide (N ₂ O) and the like. Among these, hydrofluorocarbon, hydrochlorofluorocarbon, chlorofluorocarbon, hydrochlorocarbon, fluorocarbon and fluoroether are preferable.

As the tracer, specifically, the following compounds (hereinafter, also referred to as tracer compounds) are more preferable.
HCC-40 (chloromethane, CH ₃ Cl)
HFC-41 (fluoromethane, CH ₃ F)
HFC-161 (fluoroethane, CH ₃ CH ₂ F)
HFC-245fa (1,1,1,3,3-pentafluoropropane, CF ₃ CH ₂ CHF ₂ )
HFC-236fa (1,1,1,3,3,3-hexafluoropropane, CF ₃ CH ₂ CF ₃ )
HFC-236ea (1,1,1,2,3,3-hexafluoropropane, CF ₃ CHFCHF ₂ )
HCFC-22 (chlorodifluoromethane, CHClF ₂ )
HCFC-31 (chlorofluoromethane, CH ₂ ClF)
CFC-1113 (chlorotrifluoroethylene, CF ₂ =CClF)
HFE-125 (trifluoromethyl-difluoromethyl ether, CF ₃ OCHF ₂ )
HFE-134a (trifluoromethyl-fluoromethyl ether, CF ₃ OCH ₂ F)
HFE-143a (trifluoromethyl - methyl ether, CF _₃ OCH ₃₎
HFE-227ea (trifluoromethyl - tetrafluoroethyl ether, CF _₃ OCHFCF ₃₎
HFE-236fa (trifluoromethyl - trifluoroethyl ether, CF _₃ OCH ₂ CF ₃₎

The above tracer compound may be present in the refrigerant composition in a total concentration of 10 mass parts per million (ppm) to 1000 ppm. The tracer compound is preferably present in the refrigerant composition in a total concentration of 30 ppm to 500 ppm, more preferably present in the refrigerant composition in a total concentration of 50 ppm to 300 ppm, and more preferably in a total concentration of 75 ppm to 250 ppm. Is more preferably present in the refrigerant composition, and particularly preferably present in the refrigerant composition in a total concentration of 100 ppm to 200 ppm.

2.3 UV Fluorescent Dye The refrigerant composition of the present disclosure may contain one type of UV fluorescent dye, or may contain two or more types.

The above-mentioned ultraviolet fluorescent dye is not particularly limited, and can be appropriately selected from generally used ultraviolet fluorescent dyes.

Examples of the ultraviolet fluorescent dye include naphthalimide, coumarin, anthracene, phenanthrene, xanthene, thioxanthene, naphthoxanthene and fluorescein, and derivatives thereof. Among these, naphthalimide and coumarin are preferable.

2.4 Stabilizer The refrigerant composition of the present disclosure may contain a single stabilizer, or may contain two or more stabilizers.

The above-mentioned stabilizer is not particularly limited, and can be appropriately selected from commonly used stabilizers.

Examples of the stabilizer include nitro compounds, ethers, amines and the like.

Examples of the nitro compound include aliphatic nitro compounds such as nitromethane and nitroethane, and aromatic nitro compounds such as nitrobenzene and nitrostyrene.

Examples of ethers include 1,4-dioxane.

Examples of amines include 2,2,3,3,3-pentafluoropropylamine and diphenylamine.

Examples of the stabilizer include butylhydroxyxylene, benzotriazole, etc. in addition to the nitro compounds, ethers and amines.

The content ratio of the stabilizer is not particularly limited, and is usually 0.01 to 5% by mass, preferably 0.05 to 3% by mass, more preferably 0.1 to 2% by mass, and 0.25 to 1.5% by mass with respect to the entire refrigerant. % Is more preferable, and 0.5 to 1% by mass is particularly preferable.

The method for evaluating the stability of the refrigerant composition of the present disclosure is not particularly limited and can be evaluated by a commonly used method. As an example of such a method, there is a method of evaluating the amount of free fluoride ion as an index according to ASHRAE Standard 97-2007. In addition, there is also a method of evaluating the total acid number as an index. This method can be performed according to, for example, ASTM D974-06.

2.5 Polymerization Inhibitor The refrigerant composition of the present disclosure may contain one polymerization inhibitor alone, or may contain two or more polymerization inhibitors.

The above polymerization inhibitor is not particularly limited, and can be appropriately selected from commonly used polymerization inhibitors.

Examples of the polymerization inhibitor include 4-methoxy-1-naphthol, hydroquinone, hydroquinone methyl ether, dimethyl-t-butylphenol, 2,6-di-tert-butyl-p-cresol, benzotriazole and the like.

The content ratio of the above-mentioned polymerization inhibitor is not particularly limited, and is usually 0.01 to 5% by mass, preferably 0.05 to 3% by mass, more preferably 0.1 to 2% by mass, and 0.25 to 1.5% based on the entire refrigerant. Mass% is more preferable, and 0.5 to 1% is particularly preferable.

2.6 Other Components that may be Included in the Refrigerant Composition The refrigerant composition of the present disclosure is mentioned as optionally including the following components.

For example, it may contain a fluorinated hydrocarbon different from the aforementioned refrigerant. The fluorinated hydrocarbon as the other component is not particularly limited, and examples thereof include at least one fluorinated hydrocarbon selected from the group consisting of HCFC-1122, HCFC-124, and CFC-1113.

Further, as other components, for example, the formula (A): C _m H _n X _p [In the formula, each X independently represents a fluorine atom, a chlorine atom or a bromine atom, m is 1 or 2, 2m+2≧n+p and p≧1. ] It can contain at least 1 type of halogenated organic compound represented by these. The halogenated organic compound is not particularly limited, for example, difluorochloromethane, chloromethane, 2-chloro-1,1,1,2,2-pentafluoroethane, 2-chloro-1,1,1,2- Tetrafluoroethane, 2-chloro-1,1-difluoroethylene, trifluoroethylene and the like are preferable.

Further, as other components, for example, the formula (B): C _m H _n X _p [wherein, each X independently represents an atom which is not a halogen atom, m is 1 or 2, 2m + 2 ≧n+p and p≧1. ] At least 1 type of organic compound represented by these can be contained. The organic compound is not particularly limited, and for example, propane, isobutane and the like are preferable.

The content of these fluorinated hydrocarbons, the halogenated organic compound represented by the above formula (A), and the organic compound represented by the above formula (B) is not limited, but as the total amount thereof, the refrigerant composition Is preferably 0.5 mass% or less, more preferably 0.3 mass% or less, particularly preferably 0.1 mass% or less.

3. Refrigerating machine oil-containing working fluid The refrigerating machine oil-containing working fluid of the present disclosure includes at least the refrigerant or the refrigerant composition of the present disclosure and refrigerating machine oil, and is used as a working fluid in a refrigerating apparatus. Specifically, the refrigerating machine oil-containing working fluid of the present disclosure is obtained by mixing refrigerating machine oil used in a compressor of a refrigerating apparatus with a refrigerant or a refrigerant composition.

The content ratio of the refrigerating machine oil is not particularly limited, and is usually 10 to 50% by mass, preferably 12.5 to 45% by mass, more preferably 15 to 40% by mass, based on the entire working fluid containing the refrigerating machine oil. 17.5 to 35 mass% is more preferable, and 20 to 30 mass% is particularly preferable.

3.1 Refrigerating Machine Oil The composition of the present disclosure may contain one kind of refrigerating machine oil, or may contain two or more kinds.

The refrigerating machine oil is not particularly limited, and can be appropriately selected from commonly used refrigerating machine oils. In that case, if necessary, it is more excellent in terms of compatibility with the mixture of the refrigerant of the present disclosure (mixed refrigerant of the present disclosure) and the effect of improving the stability of the mixed refrigerant of the present disclosure and the like. The refrigerating machine oil used can be appropriately selected.

As the base oil of the refrigerating machine oil, for example, at least one selected from the group consisting of polyalkylene glycol (PAG), polyol ester (POE) and polyvinyl ether (PVE) is preferable.

The refrigerating machine oil may further contain additives in addition to the base oil.

The additive is at least one selected from the group consisting of antioxidants, extreme pressure agents, acid scavengers, oxygen scavengers, copper deactivators, rust inhibitors, oiliness agents and defoamers. Good.

From the viewpoint of lubrication, it is preferable that the refrigerating machine oil has a kinematic viscosity of 5 to 400 cSt at 40°C.

The refrigerating machine oil-containing working fluid of the present disclosure may further include at least one additive, if necessary. Examples of the additive include the following compatibilizing agents.

3.2 Compatibilizer The refrigerating machine oil-containing working fluid of the present disclosure may contain one compatibilizer alone, or may contain two or more compatibilizers.

The compatibilizer is not particularly limited, and can be appropriately selected from the commonly used compatibilizers.

Examples of the compatibilizer include polyoxyalkylene glycol ether, amide, nitrile, ketone, chlorocarbon, ester, lactone, aryl ether, fluoroether, 1,1,1-trifluoroalkane, and the like. Among these, polyoxyalkylene glycol ether is preferable.

The following is a more detailed explanation with reference to examples. However, the present disclosure is not limited to these examples.

Test Example 1-1
The GWPs of the mixed refrigerants shown in Examples 1-1 to 1-3, Comparative examples 1-1 to 1-6 and Reference example 1-1 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

Refp 10.0 (National Institute of Science and Technology (NIST)) was used for the COP, refrigeration capacity, discharge temperature, saturation pressure at saturation temperature 40°C, condensation pressure and evaporation pressure of these mixed refrigerants, and mixed under the following conditions. It was obtained by performing a refrigeration cycle theoretical calculation of the refrigerant.
<Air conditioning conditions>
Evaporation temperature 10℃
Condensation temperature 40°C
Overheating temperature 20K
Supercooling temperature 0K
Compressor efficiency 70%

"Evaporation temperature 10°C" means that the evaporation temperature of the mixed refrigerant in the evaporator of the refrigeration system is 10°C. Further, “condensing temperature 40° C.” means that the condensing temperature of the mixed refrigerant in the condenser of the refrigerating apparatus is 40° C.

The results of Test Example 1-1 are shown in Table 1. Table 1 shows examples and comparative examples of the refrigerant 1 of the present disclosure. In Table 1, "COP ratio" and "refrigerating capacity ratio" indicate the ratio (%) to R134a. In Table 1, “saturation pressure (40° C.)” indicates the saturation pressure at a saturation temperature of 40° C. In Table 1, “discharge temperature (° C.)” indicates the temperature at which the temperature is highest in the refrigeration cycle in the refrigeration cycle theoretical calculation of the mixed refrigerant.

The coefficient of performance (COP) was calculated by the following formula.
COP = (refrigerating capacity or heating capacity) / power consumption

The compression ratio was calculated by the following formula.
Compression ratio = Condensing pressure (Mpa) / Evaporating pressure (Mpa)

The flammability of the mixed refrigerant was judged by setting the mixed composition of the mixed refrigerant to the WCF concentration and measuring the combustion speed according to ANSI/ASHRAE34-2013 standard. The flammability of R134a was judged by setting the composition of R134a as WCF concentration and measuring the burning rate according to the ANSI/ASHRAE 34-2013 standard.

The mixed refrigerant with a burning rate of 0 cm/s to 10 cm/s is "class 2L (lightly burned)", and the mixed refrigerant with a burning rate of more than 10 cm/s is "class 2 (lightly burned)". R134a was classified as "Class 1 (non-combustible)" because there was no flame propagation. In Table 1, "ASHRAE flammability category" indicates the results based on this criterion.

The burning rate test was conducted as follows. First, the mixed refrigerant used had a purity of 99.5% or higher, and was deaerated by repeating a cycle of freezing, pumping and thawing until no trace of air was observed on the vacuum gauge. The burning rate was measured by the closed method. The initial temperature was ambient temperature. Ignition was performed by creating an electrical spark between the electrodes at the center of the sample cell. The duration of the discharge was 1.0-9.9 ms and the ignition energy was typically about 0.1-1.0 J. A schlieren photograph was used to visualize the spread of the flame. A cylindrical container (internal diameter: 155 mm, length: 198 mm) equipped with two acrylic windows that allow light to pass was used as a sample cell, and a xenon lamp was used as a light source. A Schlieren image of the flame was recorded with a high-speed digital video camera at a framing speed of 600 fps and saved on a PC.

The combustion range of the mixed refrigerant was measured using a measuring device based on ASTM E681-09 (see Fig. 1).

Specifically, a spherical glass flask with an internal volume of 12 liters is used so that the state of combustion can be visually and video-recorded.When the glass flask generates excessive pressure due to combustion, gas is released from the upper lid. It was to so. The ignition method was generated by discharge from an electrode held at a height of 1/3 from the bottom.

<Test conditions>
Test container: 280 mmφ spherical (internal volume: 12 liters)
Test temperature: 60℃±3℃
Pressure: 101.3kPa±0.7kPa
Moisture content: 0.0088g ± 0.0005g per 1g of dry air (50% relative humidity at 23°C) Refrigerant composition/air mixing ratio: 1vol.% increments ±0.2vol.%
Refrigerant composition mixture: ±0.1% by mass
Ignition method: AC discharge, voltage 15kV, current 30mA, neon transformer electrode spacing: 6.4mm (1/4inch)
Spark: 0.4 seconds ±0.05 seconds Criteria:
・When the flame spreads more than 90 degrees around the ignition point = flame spread (flammable)
・When the flame spreads 90 degrees or less around the ignition point = no flame spread (non-combustible)

Test Example 1-2
The GWPs of the mixed refrigerants shown in Examples 1-4 to 1-6, Comparative Examples 1-7 to 1-12 and Reference Example 1-2 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

Refp 10.0 (manufactured by NIST) is used for the COP, refrigeration capacity, discharge temperature, saturation pressure at saturation temperature 45°C, condensation pressure and evaporation pressure of these mixed refrigerants, and the refrigeration cycle theoretical calculation of the mixed refrigerant is performed under the following conditions. Was obtained by doing.
<Air conditioning conditions>
Evaporation temperature 5℃
Condensation temperature 45°C
Overheating temperature 5K
Supercooling temperature 5K
Compressor efficiency 70%

-The above terms have the same meanings as in Test Example 1-1.

Table 2 shows the results of Test Example 1-2. Table 2 shows examples and comparative examples of the refrigerant 1 of the present disclosure. In Table 2, the meaning of each term is the same as in Test Example 1-1.

The coefficient of performance (COP) and compression ratio were obtained in the same manner as in Test Example 1-1.

The flammability of the mixed refrigerant was judged in the same manner as in Test Example 1-1. The burning rate test was performed in the same manner as in Test Example 1-1.

The combustion range of the mixed refrigerant was measured using the measuring device based on ASTM E681-09 (see Fig. 1) by the same method and test conditions as in Test Example 1-1.

Test Example 1-3
The GWPs of the mixed refrigerants shown in Examples 1-7 to 1-9, Comparative Examples 1-13 to 1-18 and Reference Example 1-3 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

Refprop 10.0 (manufactured by NIST) is used for the COP, refrigeration capacity, discharge temperature, saturation pressure at saturation temperature 40°C, condensation pressure and evaporation pressure of these mixed refrigerants, and the refrigerant cycle theoretical calculation of the mixed refrigerant is performed under the following conditions. Was obtained by doing.
<Air conditioning conditions>
Evaporation temperature -10℃
Condensation temperature 40°C
Overheating temperature 20K
Supercooling temperature 0K
Compressor efficiency 70%

-The above terms have the same meanings as in Test Example 1-1.

Table 3 shows the results of Test Examples 1-3. Table 3 shows examples and comparative examples of the refrigerant 1 of the present disclosure. In Table 3, the meaning of each term is the same as in Test Example 1-1.

Test Example 1-4
The GWPs of the mixed refrigerants shown in Examples 1-10 to 1-12, Comparative Examples 1-19 to 1-24 and Reference Example 1-4 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

Refprop 10.0 (manufactured by NIST) is used for the COP, refrigeration capacity, discharge temperature, saturation pressure at saturation temperature 40°C, condensation pressure and evaporation pressure of these mixed refrigerants, and the refrigerant cycle theoretical calculation of the mixed refrigerant is performed under the following conditions. Was obtained by doing.
<Air conditioning conditions>
Evaporation temperature -35°C
Condensation temperature 40°C
Overheating temperature 20K
Supercooling temperature 0K
Compressor efficiency 70%

-The above terms have the same meanings as in Test Example 1-1.

Table 4 shows the results of Test Examples 1-4. Table 4 shows examples and comparative examples of the refrigerant 1 of the present disclosure. In Table 4, the meaning of each term is the same as in Test Example 1-1.

Test Example 1-5
The GWPs of the mixed refrigerants shown in Examples 1-13 to 1-15, Comparative Examples 1-25 to 1-30 and Reference Example 1-5 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

Refprop 10.0 (manufactured by NIST) is used for the COP, refrigeration capacity, discharge temperature, saturation pressure at saturation temperature 40°C, condensation pressure and evaporation pressure of these mixed refrigerants, and the refrigerant cycle theoretical calculation of the mixed refrigerant is performed under the following conditions. Was obtained by doing.
<Air conditioning conditions>
Evaporation temperature -50°C
Condensation temperature 40°C
Overheating temperature 20K
Supercooling temperature 0K
Compressor efficiency 70%

-The above terms have the same meanings as in Test Example 1-1.

Table 5 shows the results of Test Example 1-5. Table 5 shows examples and comparative examples of the refrigerant 1 of the present disclosure. In Table 5, the meaning of each term is the same as in Test Example 1-1.

Test Example 1-6
The GWPs of the mixed refrigerants shown in Examples 1-16 to 1-18, Comparative Examples 1-31 to 1-36 and Reference Example 1-6 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

Refprop 10.0 (manufactured by NIST) is used for the COP, refrigeration capacity, discharge temperature, saturation pressure at saturation temperature 40°C, condensation pressure and evaporation pressure of these mixed refrigerants, and the refrigerant cycle theoretical calculation of the mixed refrigerant is performed under the following conditions. Was obtained by doing.
<Air conditioning conditions>
Evaporation temperature -65°C
Condensation temperature 40°C
Overheating temperature 20K
Supercooling temperature 0K
Compressor efficiency 70%

-The above terms have the same meanings as in Test Example 1-1.

Table 6 shows the results of Test Example 1-6. Table 6 shows examples and comparative examples of the refrigerant 1 of the present disclosure. In Table 6, the meaning of each term is the same as in Test Example 1-1.

Test Example 2-1
The GWPs of the mixed refrigerants shown in Examples 2-1 to 2-4, Comparative Examples 2-1 to 2-6 and Reference Example 2-1 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

Table 7 shows the results of Test Example 2-1. Table 7 shows Examples and Comparative Examples of the refrigerant 2 of the present disclosure. In Table 7, "COP ratio" and "refrigeration capacity ratio" indicate the ratio (%) to R134a. In Table 7, “saturation pressure (40° C.)” indicates the saturation pressure at a saturation temperature of 40° C. In Table 7, the “discharge temperature (° C.)” indicates the temperature at which the temperature becomes highest in the refrigeration cycle theoretical calculation of the mixed refrigerant.

The mixed refrigerant with a burning rate of 0 cm/s to 10 cm/s is "class 2L (lightly burned)", and the mixed refrigerant with a burning rate of more than 10 cm/s is "class 2 (lightly burned)". R134a was classified as "Class 1 (non-combustible)" because there was no flame propagation. In Table 7, "ASHRAE flammability category" indicates the result based on this criterion.

Test Example 2-2
The GWPs of the mixed refrigerants shown in Examples 2-5 to 2-8, Comparative Examples 2-7 to 2-12 and Reference Example 2-2 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

-The above terms have the same meanings as in Test Example 2-1.

Table 8 shows the results of Test Example 2-2. Table 8 shows examples and comparative examples of the refrigerant 2 of the present disclosure. In Table 8, the meaning of each term is the same as in Test Example 2-1.

The coefficient of performance (COP) and compression ratio were obtained in the same manner as in Test Example 2-1.

The flammability of the mixed refrigerant was judged in the same manner as in Test Example 2-1. The burning rate test was performed in the same manner as in Test Example 2-1.

The combustion range of the mixed refrigerant was measured by the same method and test conditions as in Test Example 2-1 using a measuring device based on ASTM E681-09 (see Fig. 1).

Test Example 2-3
The GWPs of the mixed refrigerants shown in Examples 2-9 to 2-12, Comparative Examples 2-13 to 2-18 and Reference Example 2-3 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

-The above terms have the same meanings as in Test Example 2-1.

Table 9 shows the results of Test Example 2-3. Table 9 shows examples and comparative examples of the refrigerant 2 of the present disclosure. In Table 9, the meaning of each term is the same as in Test Example 2-1.

Test Example 2-4
The GWPs of the mixed refrigerants shown in Examples 2-13 to 2-16, Comparative Examples 2-19 to 2-24 and Reference Example 2-4 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

-The above terms have the same meanings as in Test Example 2-1.

Table 10 shows the results of Test Example 2-4. Table 10 shows Examples and Comparative Examples of the refrigerant 2 of the present disclosure. In Table 10, the meaning of each term is the same as in Test Example 2-1.

Test Example 2-5
The GWPs of the mixed refrigerants shown in Examples 2-17 to 2-20, Comparative examples 2-25 to 2-30 and Reference example 2-5 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

-The above terms have the same meanings as in Test Example 2-1.

Table 11 shows the results of Test Example 2-5. Table 11 shows examples and comparative examples of the refrigerant 2 of the present disclosure. In Table 11, the meaning of each term is the same as in Test Example 2-1.

Test Example 2-6
The GWPs of the mixed refrigerants shown in Examples 2-21 to 2-24, Comparative Examples 2-31 to 2-36 and Reference Example 2-6 (R134a) were evaluated based on the values in the IPCC Fourth Report. ..

-The above terms have the same meanings as in Test Example 2-1.

Table 12 shows the results of Test Example 2-6. Table 12 shows examples and comparative examples of the refrigerant 2 of the present disclosure. In Table 12, the meaning of each term is the same as in Test Example 2-1.

1: Preparation line 2: Sampling line 3: Thermometer 4: Pressure gauge 5: Electrode 6: Stirring blade (made of PTFE)

Claims

A composition containing a refrigerant,
The refrigerant contains cis-1,2-difluoroethylene (HFO-1132(Z)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132(Z) and HFO-1234yf,
The content ratio of HFO-1132(Z) is 53.0-59.5 mass%,
A composition in which the content ratio of HFO-1234yf is 47.0 to 40.5% by mass.
The composition according to claim 1, wherein the refrigerant is used for operating a refrigeration cycle having an evaporation temperature of -60 to 20°C.
The composition according to claim 1 or 2, wherein the refrigerant comprises HFO-1132(Z) and HFO-1234yf only.
A composition containing a refrigerant,
The refrigerant contains cis-1,2-difluoroethylene (HFO-1132(Z)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132(Z) and HFO-1234yf,
The content ratio of HFO-1132(Z) is 41.0 to 49.2 mass%,
A composition in which the content ratio of HFO-1234yf is 59.0 to 50.8 mass%.
The composition according to claim 4, wherein the refrigerant is used for operating a refrigeration cycle having an evaporation temperature of -60 to 20°C.
The composition according to claim 4 or 5, wherein the refrigerant comprises HFO-1132(Z) and HFO-1234yf only.
R134a, R22, R12, R404A, R407A, R407C, R407F, R407H, R410A, R413A, R417A, R422A, R422B, R422C, R422D, R423A, R424A, R426A, R427A, R428A, R430A, R434A, R437A, R438A, R448A, R448A, R438A, R438A, R438A, R438A, R438A 7. The R449A, R449B, R449C, R450A, R452A, R452B, R454A, R452B, R454C, R455A, R465A, R502, R507, R513A, R513B, R515A or R515B, which is used as an alternative refrigerant and is used as an alternative refrigerant. The composition according to.
The composition according to any one of claims 1 to 7, containing at least one substance selected from the group consisting of water, a tracer, an ultraviolet fluorescent dye, a stabilizer and a polymerization inhibitor.
The composition according to any one of claims 1 to 8, which further contains refrigerating machine oil and is used as a working fluid for a refrigerating apparatus.
The composition according to claim 9, wherein the refrigerating machine oil contains at least one polymer selected from the group consisting of polyalkylene glycol (PAG), polyol ester (POE) and polyvinyl ether (PVE).
A refrigeration method comprising a step of operating a refrigeration cycle using the composition according to any one of claims 1 to 10.
A method for operating a refrigerating apparatus for operating a refrigeration cycle using the composition according to any one of claims 1 to 10.
A refrigeration system containing the composition according to any one of claims 1 to 10 as a working fluid.
It is selected from the group consisting of air conditioners, refrigerators, freezers, chillers, ice makers, refrigerating showcases, freezing showcases, refrigerating/refrigerating units, refrigerators for freezers/refrigerators, in-vehicle air conditioners, turbo refrigerators and screw refrigerators. The refrigerating apparatus according to claim 13, which is at least one kind.